CVE-2026-119660
MuseBot before 2.0.0 Authentication Bypass via Hard-Coded Session Key
- State
- Published
- Severity
- 9.3 Critical
- Published
- Oct 30, 2026
- Updated
- Oct 30, 2026
- Reserved
- Oct 30, 2026
Description
MuseBot before 2.0.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge admin sessions by using the hard-coded default session_key 'muse_bot_session_key'. Attackers can sign a MuseBot-session cookie carrying a user_id to gain full administrative access, reading password hashes, chat records, and bot configuration, and stopping bots.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-1394 Use of Default Cryptographic Key
Affected Products
| Product | Versions |
|---|---|
MuseBotyincongcyincong |
|
References
- https://github.com/yincongcyincong/MuseBot/issues/61issue-tracking
- https://github.com/yincongcyincong/MuseBot/commit/3e64518948fe7037058f07ef987d35216c3f0caepatch
- https://github.com/yincongcyincong/MuseBot/commit/139f6158b50283b983d76976f593a3a09a064681patch
- https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/conf/conf.go#L28technical-description
- https://github.com/yincongcyincong/MuseBot/blob/v1.0.42/admin/controller/login.go#L19-L88technical-description
- https://hackmd.io/@hieuPenguinnn/musebot-admin-default-session-key-auth-bypassthird-party-advisory
- https://github.com/yincongcyincong/MuseBotproduct
- VulnCheck Advisory: MuseBot before 2.0.0 Authentication Bypass via Hard-Coded Session Keythird-party-advisory
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